Fixing Error “failed, reason: getaddrinfo EAI_AGAIN” in Gitlab Builds

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Some days ago, I detected some new errors in one of our builds pipelines. The interesting part is, that there were no changes done, that might have caused this error.
One example for this error was an DNS resolution error using npm:

#9 [4/5] RUN npm i npm@latest
#9 71.06 npm ERR! code EAI_AGAIN
#9 71.06 npm ERR! syscall getaddrinfo
#9 71.06 npm ERR! errno EAI_AGAIN
#9 71.06 npm ERR! request to failed, reason: getaddrinfo EAI_AGAIN
#9 71.06 
#9 71.06 npm ERR! A complete log of this run can be found in:
#9 71.06 npm ERR!     /root/.npm/_logs/2023-02-10T08_30_43_730Z-debug-0.log
#9 ERROR: executor failed running [/bin/sh -c npm i npm@latest]: runc did not terminate sucessfully

After some digging, I found out, that the only update might have come with an updated docker build behaviour, since the docker image, used in this job is docker:latest.

Some Google queries later, I found an issue realted to this topic. It points to a blog post about a strange behaviour of docker in regards to DNS. But since, I had no issues before, I ruled out, that this might be the case here.

And indeed, a look in the latest release notes pointed out the obvious:

Alias docker build to docker buildx build


The easiest fix was to disable buildx alltogether via these ENV Vars:

  image: docker:latest
  stage: build
    - docker:dind

After this change, the build job did run without any errors.

Create CSV Reports from GIT Repositories containing your commits

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Some months ago, I got the need to run over several GIT Repositories and collect the work I did on each day. The play was to gather all the data and collect them in different CSV files.
Since I wasn’t able to find a ready script for this task, I guess it is a good candidate for a quick blog post :-).

The first part is a file folders.txt with a list of all GIT Repositories that we want to analyse. (All folders are Subfolders of a root Directory /Users/user/GIT. This root folder can be changed later on.)

cat folders.txt


The script does several things:

  1. Going through every repository and collecting Project,Date,Commit,Name,Email,Comment of each commit.
  2. We also need to do some filtering first to deal with characters in the commit messages, that might break the CSV later on.
  3. The last step is to split the complete log file into the different months.

At the moment the script does only run for one specific year, but that can be changed with adding another loop to run it for a bunch of years.

The Source of the Script is:


#YEAR=$(date +"%Y")
PROJECTS=$(cat folders.txt)
CREATOR="Philipp Haussleiter"
echo "" > /tmp/csv/all.csv
mkdir -p csv/$YEAR $TMP_DIR
rm -Rf $TMP_DIR/*

for PROJECT in ${PROJECTS}; do
    echo "creating log of ${PROJECT}"
    BASENAME=$(basename $DIR)
    cd ${DIR}
    git log --pretty=format:__${BASENAME}__,__%cs__,__%h__,__%an__,__%ae__,__%s__ > /tmp/csv/${BASENAME}.a.log
    cat /tmp/csv/${BASENAME}.a.log | sed -r 's/[\"]+/\"\"/g' > /tmp/csv/${BASENAME}.b.log
    cat /tmp/csv/${BASENAME}.b.log | sed -r 's/__+/\"/g' > /tmp/csv/${BASENAME}.log
    echo "" >> /tmp/csv/${BASENAME}.log
    cat /tmp/csv/${BASENAME}.log >> /tmp/csv/all.csv
    rm /tmp/csv/${BASENAME}.a.* /tmp/csv/${BASENAME}.b.*
    cd ${ROOT}

for MONTH in $(seq -f "%02g" 1 12); do
    echo $HEADER > $FILE
    cat /tmp/csv/all.csv |grep "$CREATOR" |grep $FILTER >> $FILE
    echo $HEADER > csv/$YEAR/all.csv
    cat /tmp/csv/all.csv |grep "$CREATOR" >> csv/all.csv
    echo $FILE

After running the script for the years 2021 and 2022, you get a folder structure like this:

├── 2021
│   ├── 2021-01.csv
│   ├── 2021-02.csv
│   ├── 2021-03.csv
│   ├── 2021-04.csv
│   ├── 2021-05.csv
│   ├── 2021-06.csv
│   ├── 2021-07.csv
│   ├── 2021-08.csv
│   ├── 2021-09.csv
│   ├── 2021-10.csv
│   ├── 2021-11.csv
│   └── 2021-12.csv
└── 2022
    ├── 2022-01.csv
    ├── 2022-02.csv
    ├── 2022-03.csv
    ├── 2022-04.csv
    ├── 2022-05.csv
    ├── 2022-06.csv
    ├── 2022-07.csv
    ├── 2022-08.csv
    ├── 2022-09.csv
    ├── 2022-10.csv
    ├── 2022-11.csv
    └── 2022-12.csv

Teaching Mailcow how to deal with Ham/Spam

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The good must be put in the dish, the bad you may eat if you wish.


Mailcow is a groupware solutions, that is mainly used for email messaging. With Mailcow, you can setup your own Docker-based Mail-Server + Addons.

Mailcow uses rspamd to filter out Spam Messages.
However, after some time, there is a need to fine-tune the Spam (Spam Messages)/Ham (“good” Messages) filtering.

There is a documented method to learn Spam from existing emails within a directory, but especially for non-technical users, that might be hard to understand.

So I updated this method a little bit:

  • every user hast two folders rspamd/spam and rspamd/ham in their home directory.
  • Every user can new just drop new spam messages into the spam and false spam messages into the ham folder.
  • A cron Jobs runs every hour to parse the user directories for new files and updates the rspamd behaviour.

The script for SPAM learning looks like this (assumed that mailcow is installed in /opt/mailcow-dockerized):


cd /opt/mailcow-dockerized
for u in $(ls /home); do
    ""mv /home/$u/rspamd/spam/* ./data/rspamd/spam/""
for file in ""./data/rspamd/spam/*""; do 
    docker exec -i $(docker-compose ps -q rspamd-mailcow) rspamc learn_spam < "$file"

""rm -Rf ./data/rspamd/spam/*""

There is also a similar script for HAM learning:


cd /opt/mailcow-dockerized
for u in $(ls /home); do
    ""mv /home/$u/rspamd/ham/* ./data/rspamd/ham/""
for file in ""./data/rspamd/ham/*""; do 
    docker exec -i $(docker-compose ps -q rspamd-mailcow) rspamc learn_ham < "$file"
""rm -Rf ./data/rspamd/ham/*""

Both scripts will produce some output, so a good way of running it via cron, is to pipe the output into a log file.

Using the MacOS airport utility

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Using the MacOS airport utility.

Sometimes you need to gather information abouth your current WiFi Connection of you Mac via CLI only (maybe you just have a remote SSH Connection to do so).

With the airport tool, there is a handy utility to perform most of the tasks, that you would normally do via the UI.

You can find that tool in /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport. To run it, you need to have elevated access rights (run it with sudo).

Best thing is to create an alias first before using the tool:

alias airport='sudo /System/Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport'

Display the WiFi Preferences

philipp@Imotep ~ % airport prefs
AirPort preferences for en0:


Listing all available WiFi Networks

philipp@Imotep ~ % airport  -s
            SSID BSSID             RSSI CHANNEL HT CC SECURITY (auth/unicast/group)
                  Network1 24:65:11:d3:bd:85 -88  1,+1    Y  -- RSN(PSK/AES/AES)
                  Network2 ac:22:05:1c:12:4d -83  40      Y  -- RSN(PSK/AES/AES)
                      Home 3c:a6:2f:78:22:cc -80  11      Y  DE RSN(PSK/AES/AES)
                      Home 3c:a6:2f:78:22:cb -78  40      Y  DE RSN(PSK/AES/AES)
          Vodafone Hotspot ae:22:15:1c:12:6f -77  1       Y  EU NONE
                  Network2 ac:22:05:1c:12:6f -77  1       Y  EU RSN(PSK/AES/AES)
                      Home b8:be:f4:87:2e:b0 -74  6,+1    Y  DE RSN(PSK,FT-PSK/AES/AES)
                      Home b8:be:f4:87:2e:b1 -73  48      Y  DE RSN(PSK,FT-PSK/AES/AES) 66:b6:fc:72:c2:28 -51  6       Y  DE NONE 9c:c9:eb:4f:a7:91 -59  44      Y  DE NONE

Listing a specific WiFi Network

Use airport -s <SSID>

philipp@Imotep ~ % airport -s Home
                            SSID BSSID             RSSI CHANNEL HT CC SECURITY (auth/unicast/group)
                          Home 3c:a6:2f:78:22:cc -81  11      Y  DE RSN(PSK/AES/AES)
                          Home 3c:a6:2f:78:22:cb -78  100     Y  DE RSN(PSK/AES/AES)
                          Home b8:be:f4:87:2e:b0 -74  6,+1    Y  DE RSN(PSK,FT-PSK/AES/AES)
                          Home b8:be:f4:87:2e:b1 -69  48      Y  DE RSN(PSK,FT-PSK/AES/AES)

Display the Metrics of your current connection

philipp@Imotep ~ % airport  -I
     agrCtlRSSI: -44
     agrExtRSSI: 0
    agrCtlNoise: -95
    agrExtNoise: 0
          state: running
        op mode: station
     lastTxRate: 144
        maxRate: 144
lastAssocStatus: 0
    802.11 auth: open
      link auth: wpa2-psk
          BSSID: e4:c3:2a:dd:36:f8
           SSID: Home
            MCS: 15
  guardInterval: 800
            NSS: 2
        channel: 9

Get the SSID of the currently connected WiFi

philipp@Imotep ~ %  ioreg -l -n AirPortDriver | grep IO80211SSID | sed 's/^.*= "\(.*\)".*$/\1/; s/ /_/g'